叶蜡石合成堇青石工艺研究

Study on the process of cordierite synthesized by pyrophyllite

采用含结构水少、烧失量低、煅烧后体积变化小的叶蜡石原料，可制得气孔率＜ １４ ％ ，体积密度≥１ ．９４ ｇ·ｃｍ －３ ，主矿物含量＞ ９０ ％ 的合成堇青石。工艺上应尽量采用杂质含量低的叶蜡石；使用天然原料合成堇青石配方中ＳｉＯ２ 应过剩。

The study results indicate that cordierite could be made by pyrophyllite raw materials with less structrual water,less weight loss and less bulk variation.The cordierite content is more than 90%,porosity is less than 14% and the bulk density is not less than 1.94g·cm -3 . As much pyrophyllite with low impurity content as feasible should be used.Slilca should be over in the recipe of synthetic cordierite.